CVE-2024-0193: Kernel: netfilter: use-after-free in nft_trans_gc_catchall_sync leads to privilege escalation
First published: Fri Dec 22 2023(Updated: )
A use-after-free flaw was found in the netfilter subsystem of the Linux kernel. If the catchall element is garbage-collected when the pipapo set is removed, the element can be deactivated twice. This can cause a use-after-free issue on an NFT_CHAIN object or NFT_OBJECT object, allowing a local unprivileged user with CAP_NET_ADMIN capability to escalate their privileges on the system.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux kernel | ||
| Red Hat Enterprise Linux | =9.0 | |
| debian/linux | 5.10.223-1 5.10.234-1 6.1.129-1 6.1.135-1 6.12.25-1 6.12.27-1 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=2255653
- https://access.redhat.com/security/cve/CVE-2024-0193
- https://access.redhat.com/errata/RHSA-2024:1018
- https://access.redhat.com/errata/RHSA-2024:1019
- https://access.redhat.com/errata/RHSA-2024:1248
- https://launchpad.net/bugs/cve/CVE-2024-0193
- https://access.redhat.com/errata/RHSA-2024:2094
- https://access.redhat.com/errata/RHSA-2024:4412
- https://access.redhat.com/errata/RHSA-2024:4415
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2256447
- https://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf.git/commit/?id=7315dc1e122c85ffdfc8defffbb8f8b616c2eb1a
- https://security-tracker.debian.org/tracker/CVE-2024-0193
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-0193
- https://nvd.nist.gov/vuln/detail/CVE-2024-0193
- https://ubuntu.com/security/CVE-2024-0193
Frequently Asked Questions
What is the severity of CVE-2024-0193?
CVE-2024-0193 is classified as a high-severity use-after-free vulnerability in the Linux kernel's netfilter subsystem.
How do I fix CVE-2024-0193?
To mitigate CVE-2024-0193, update your Linux kernel to the patched versions such as 5.10.223-1, 6.1.119-1, or higher as specified by your distribution.
Which Linux versions are affected by CVE-2024-0193?
CVE-2024-0193 affects multiple versions of the Linux kernel including certain versions of Debian and Red Hat Enterprise Linux.
What components are vulnerable in CVE-2024-0193?
The vulnerability in CVE-2024-0193 specifically impacts NFT_CHAIN and NFT_OBJECT objects within the netfilter subsystem.
Is CVE-2024-0193 being actively exploited?
Currently, there is no public indication that CVE-2024-0193 is being actively exploited in the wild, but it is advised to address the vulnerability promptly.
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